Update the torrent reducer from switch to map

src/public/js/reducers/torrents.js

@@ -1,20 +1,17 @@
-import { Map, List, fromJS } from 'immutable'
+import { Map, List, fromJS } from "immutable"
 
 const defaultState = Map({
-  'fetching': false,
+  "fetching": false,
-  'torrents': List(),
+  "torrents": List(),
 });
 
-export default function torrentStore(state = defaultState, action) {
+const handlers = {
-  switch (action.type) {
+  "TORRENTS_FETCH_PENDING": state => state.set("fetching", false),
-    case 'TORRENTS_FETCH_PENDING':
+  "TORRENTS_FETCH_FULFILLED": (state, action) => state.merge(fromJS({
-      return state.set('fetching', false);
-    case 'TORRENTS_FETCH_FULFILLED':
-      return state.merge(fromJS({
     fetching: false,
     torrents: action.payload.response.data,
-      }));
+  })),
-    default:
-      return state
-  }
 }
+
+export default (state = defaultState, action) =>
+  handlers[action.type] ? handlers[action.type](state, action) : state;